Ejemplo n.º 1
0
 /**
  * Check if a bean can be viewed as a given target type. The result will be true if the
  * Beans.getInstanceof method can be used on the given bean to obtain an object that represents
  * the specified targetType type view.
  *
  * @param bean Bean from which we want to obtain a view.
  * @param targetType The type of view we'd like to get.
  * @return "true" if the given bean supports the given targetType.
  */
 public static boolean isInstanceOf(Object bean, Class<?> targetType) {
   return Introspector.isSubclass(bean.getClass(), targetType);
 }
Ejemplo n.º 2
0
  /**
   * Standard constructor.
   *
   * @param type Type that you are going to be creating and editor for.
   * @param readOnly Set to true to create a read-only customizer.
   */
  public DynamicCustomizer(Class type, boolean readOnly) {
    super(new GridBagLayout());
    _readOnly = readOnly;
    _type = type;

    LabelFieldGBC gbc = new LabelFieldGBC();
    try {
      BeanInfo info = Introspector.getBeanInfo(type);
      // Set up pretty display stuff.
      setBorder(BorderFactory.createTitledBorder(info.getBeanDescriptor().getDisplayName()));
      setToolTipText(info.getBeanDescriptor().getShortDescription());

      // Get the properties and sort them.
      PropertyDescriptor[] props = info.getPropertyDescriptors();
      Arrays.sort(props, new PropertyComparator());
      for (int i = 0; i < props.length; i++) {
        // Ignore the "class" property, if it is provided.
        if (props[i].getName().equals("class")) continue;
        // Create a label for the field.
        JLabel label = new JLabel(props[i].getDisplayName() + ":");

        // Lookup the editor.
        PropertyEditor editor = getEditorForProperty(props[i]);

        // Add a listener to the editor so we know when to update
        // the bean's fields.
        editor.addPropertyChangeListener(_eListener);

        // XXX What we need to do right here is provide a component
        // that makes use of the "paintable" capability of the editor.
        Component comp = editor.getCustomEditor();
        if (comp == null) {
          comp = new JLabel("<No editor available.>");
          ((JLabel) comp).setBorder(BorderFactory.createEtchedBorder());
        }

        // See if it is a read-only property. If so, then just
        // display it.
        if (_readOnly || props[i].getWriteMethod() == null) {
          comp.setEnabled(false);
        }

        // Setup the accellerator key.
        label.setLabelFor(comp);
        label.setDisplayedMnemonic(label.getText().charAt(0));

        // Set the tool tip text, if any.
        String tip = props[i].getShortDescription();
        if (tip != null) {
          label.setToolTipText(tip);
          if (comp instanceof JComponent) {
            ((JComponent) comp).setToolTipText(tip);
          }
        }

        // Add the label and fields.
        add(label, gbc.forLabel());
        add(comp, gbc.forField());

        // Set the mappings between editor and property, etc. for
        // quick lookup later.
        _prop2Editor.put(props[i], editor);
        _editor2Prop.put(editor, props[i]);
      }
      // Filler...
      add(new JLabel(), gbc.forLastLabel());

    } catch (Exception ex) {
      ex.printStackTrace();
    }
  }